diff options
| author | Manuel Lauss <manuel.lauss@gmail.com> | 2014-07-23 16:36:24 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-07-30 13:53:28 +0200 |
| commit | 1d09de7dc76ef96a9a2c7c0244e20f12d68e6ef8 (patch) | |
| tree | 929cb54b63224fc65d7b56d52b00a89bb236b9a0 /arch/mips/alchemy/devboards/db1550.c | |
| parent | 2ef1bb99116e49226e8bab8ebab255f12fa8a99e (diff) | |
MIPS: Alchemy: introduce helpers to access SYS register block.
This patch changes all absolute SYS_XY registers to offsets from the
SYS block base, prefixes them with AU1000 to avoid silent failures due
to changed addresses, and introduces helper functions to read/write
them.
No functional changes, comparing assembly of a few select functions shows
no differences.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7464/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy/devboards/db1550.c')
| -rw-r--r-- | arch/mips/alchemy/devboards/db1550.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/mips/alchemy/devboards/db1550.c b/arch/mips/alchemy/devboards/db1550.c index bbd8d9884702..392fb89270d6 100644 --- a/arch/mips/alchemy/devboards/db1550.c +++ b/arch/mips/alchemy/devboards/db1550.c @@ -31,16 +31,16 @@ static void __init db1550_hw_setup(void) { void __iomem *base; + unsigned long v; /* complete SPI setup: link psc0_intclk to a 48MHz source, * and assign GPIO16 to PSC0_SYNC1 (SPI cs# line) as well as PSC1_SYNC * for AC97 on PB1550. */ - base = (void __iomem *)SYS_CLKSRC; - __raw_writel(__raw_readl(base) | 0x000001e0, base); - base = (void __iomem *)SYS_PINFUNC; - __raw_writel(__raw_readl(base) | 1 | SYS_PF_PSC1_S1, base); - wmb(); + v = alchemy_rdsys(AU1000_SYS_CLKSRC); + alchemy_wrsys(v | 0x000001e0, AU1000_SYS_CLKSRC); + v = alchemy_rdsys(AU1000_SYS_PINFUNC); + alchemy_wrsys(v | 1 | SYS_PF_PSC1_S1, AU1000_SYS_PINFUNC); /* reset the AC97 codec now, the reset time in the psc-ac97 driver * is apparently too short although it's ridiculous as it is. |